Guys,
Yep, 6lowpan-nd and RFC4861 are not interoperable on the same link as
6lowpan-nd-05 is written. That has not been a requirement nor an
assumption so far from the WG. We assume that all LoWPAN nodes run
6LoWPAN-ND on their LoWPAN interfaces.
We need to answer the questions I posed in an e-mail earlier. Is this
something that is needed and why? How should it work? And what are the
real use cases that are useful?
Thanks,
Zach
Julien Abeille (jabeille) wrote:
Hi Geoff,
As far as I understand:
1 if a standard 4861 node (node A here) joins a lowpan with lowpan ND.
Node B is a node using 6lowpan ND
- DAD will fail (nobody answers to NS)
- Address resolution will fail (same)
- NUD fails (same)
- if the router does not also send standard Prefix Information Option in
Ras (but only 6lowpan information option),
-- prefix discovery fails (incl on-link prefixes)
-- autoconfiguration fails
Regarding node B:
- If node A does not respect the binding between its L3 and L2 address,
(the assumption that the IPv6 suffix is based on the MAC, for instance
if node A uses DHCP or CGA), node B will not be able to contact node A
- the white board is not authoritative anymore (A does not register),
- hence DAD fails for node B.
2 Now for a node using 6lowpan ND only in a pure 4861 network:
- DAD will fail (the node does not send NS)
- Address resolution will fail (same)
- NUD fails (same)
- prefix discovery, autoconfiguration fails (no 6lowpan Information
Option in RA)
- This node will just not work at all, but will not disturb other nodes.
This might be a real issue.
Best,
Julien
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Geoff Mulligan
Sent: jeudi 17 septembre 2009 08:22
To: 6lowpan
Subject: [6lowpan] RFC4861 and 6lowpan ND
Has anyone determined if a standard RFC4861 end device would
be able to work with a 6lowpan ND edge router, would it be
able to get the necessary commissioning data (prefix, default
router, ...)
And the reverse, could a 6lowpan ND end device get
commissioned via a standard RFC4861 ND router?
geoff
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